Gates EHV105 HVAC Heater Control Valve

Gates EHV105 Electric Heater Control Valve

The Gates EHV105 electric heater control valve regulates coolant flow through the heater core to help control cabin temperature. It is built for vehicles that use electric coolant valves for thermal management, including applications where coolant routing also supports battery heating and cooling in electrified systems.

Compatible with Audi A6, Audi A6 Quattro, and Audi S6 applications, this valve is an OE Exact replacement with the correct port sizing and electrical connection for the listed vehicles. The Gates Electric Heater Control Valve line focuses on direct-fit coolant flow control components for modern HVAC and thermal management systems.

Key Features

• Part number: EHV105
• OE Exact comparison rating for direct replacement use
• 1 inlet and 2 outlets for coolant routing
• Inlet outside diameter: 0.75 in. / 19 mm
• Outlet outside diameter: 0.625 in. / 16 mm
• Female electrical connector and female terminal gender
• Plastic and stainless steel construction
• Contents listed: heater control valve and water pump; coolant control valve and water pump

Detailed Description

The Gates EHV105 is an electric HVAC heater control valve that manages coolant flow through the heater core so the passenger compartment can reach and maintain the selected temperature. In vehicles with advanced thermal management, electric coolant valves also help direct coolant for system efficiency and battery temperature control. This part cross-references Four Seasons 74898 for the same application.

Fits 2006-2011 Audi A6, N/A. Fits 2005-2011 Audi A6 Quattro, N/A. Fits 2007-2011 Audi S6, N/A. For Audi A6, Audi A6 Quattro, and Audi S6 service work, the EHV105 provides the specified port layout and connector style needed for the listed applications.

Common Issues This Part Addresses

• Inconsistent cabin heat output
• Coolant flow not switching correctly through the heater core
• Temperature control that does not respond properly to HVAC settings
• Leaks or cracking in the original electric coolant valve housing
• Thermal management faults related to valve operation

Installation Notes and Tips

Verify inlet and outlet diameters, connector style, and vehicle application before installation. Confirm the valve orientation and coolant hose routing match the original layout on the vehicle. After installation, refill and bleed the cooling system according to factory service procedures to remove trapped air and restore proper heater performance.

Quality Assurance

Gates manufactures the EHV105 as an OE Exact replacement component for the listed Audi applications. The Gates Electric Heater Control Valve line is built for direct-fit service on modern HVAC and coolant management systems, including Audi A6, Audi A6 Quattro, and Audi S6 models.